The relays in earlier design boards are soldered on and cannot be replaced. Later design boards fea- ture replaceable plug-in relays. In earlier designs boards, a heat relay (K2) switches 24VAC to the ignition and gas valve circuits when the controller heat logic circuit calls for heat. Simultaneously, a blower motor relay (K4) switches 120VAC to the blower motor. In later design boards, relay K3 serves as both the heat relay and blower motor relay.

FBRA18 rethermalizers use interface board 806-9592, often referred to as a water board.

1J2

1

K1

 

K2

HEAT

 

WATER

 

 

 

K3

BLOWER

J3

POWER

J1

CYCLE WATER BLOWER

INTERFACE BOARD P/N 806-9592

On interface board 806-9592, the heat (or cycle) relay (K1) switches 24VAC to the ignition and gas valve circuits when the controller’s heat logic circuit calls for heat and the lower water level sensor is grounded (i.e., the water level in the cookpot is above the lower water level sensor). If the water level in the cookpot is below the upper water level sensor, the water relay (K2) closes, switching power to the normally closed water solenoid valve, causing it to open. When the water level reaches the upper sensor, the relay opens, cutting power to the valve, causing it to close. The blower relay (K3) closes and switches 120VAC to the blower motor only when the heat relay (K1) is closed. The board has four LEDs to assist in troubleshooting. Three of the LEDs (CYCLE, WATER, and BLOWER) are arrayed along the lower edge of the board. The fourth LED (POWER) is located at the right edge of the board. When the cycle, water, and blower LEDs are illuminated, they indicate that the associated relay is closed. The power LED indicates that 24VAC is being supplied to the interface board by the transformer.

TEMPERATURE PROBE

A temperature probe is located on the front centerline of the cookpot. The probe is a type of thermo- stat in which the resistance varies directly with the temperature. That is, as the temperature changes, so does resistance, at a rate of approximately 2 ohms for every 1° of rise or fall. Circuitry in the controller monitors the probe resistance and controls burner firing when the resistance exceeds or falls below a programmed temperature (setpoint). The temperature is programmed by means of up or down arrow buttons on the face of the controller.

WATER LEVEL SENSORS (FBRA18 Only)

A pair of water level sensors is arranged one above the other on the left front of the FBRA18 cook- pot. When water contacts the sensors they are grounded. The lower sensor acts as a safety device to keep the burner from firing when there is no water in the cookpot. When the sensor is grounded by contact with water, a transistor on the interface board is biased and the heat relay (K1) pulls in, sup- plying power to the blower via relay K3 and to the gas valve via the ignition modules. Grounding the upper water level sensor causes the water relay (K2) to open. This cuts power to the water sole- noid valve, which closes, cutting off water flow into the cookpot.

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Frymaster FBR18 Series manual Temperature Probe
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FBR18 Series specifications

The Frymaster FBR18 Series stands out in the commercial kitchen arena for its innovative design, robust features, and advanced frying technologies. This series is specifically engineered to meet the demands of busy restaurants, fast-food establishments, and large-scale food service operations. With a focus on efficiency, durability, and food quality, the FBR18 Series has become a preferred choice for chefs and kitchen managers looking for reliable frying equipment.

One of the main features of the Frymaster FBR18 Series is its industry-leading oil filtration system. This self-filtering capability ensures that oil remains clean and minimizes the frequency of oil changes, leading to significant cost savings over time. The filtration system is designed for easy operation, allowing kitchen staff to focus on food preparation rather than maintenance.

The FBR18 Series is built with stainless steel construction, which enhances durability and simplifies cleaning. The sturdy design can withstand the rigors of a bustling kitchen environment. Additionally, the fryers are equipped with advanced heating technology, including high-efficiency gas burners that provide even heat distribution and reduce recovery time. This results in faster cooking cycles and improved product quality.

Temperature control is another hallmark of the FBR18 Series. With precise digital controls and built-in temperature monitoring, chefs can achieve optimal frying results every time, ensuring consistent quality across batches. The fryers are designed with safety features, including a shut-off mechanism that activates when the fry pot reaches an unsafe temperature, ensuring the safety of both the equipment and kitchen staff.

The FBR18 Series also offers versatility with multiple frying basket options, allowing operators to fry a variety of items simultaneously. The fry pots are spacious and can accommodate larger volumes, making them ideal for high-demand settings. This series is compatible with various frying mediums, including standard oils and specialty options, providing flexibility for different menu items.

In terms of energy efficiency, the Frymaster FBR18 Series incorporates various features aimed at reducing gas or electric consumption without sacrificing performance. This not only helps in lowering operational costs but also aligns with growing sustainability practices in the food service industry.

Overall, the Frymaster FBR18 Series combines cutting-edge technologies and practical features to deliver an exceptional frying experience. Its reliability, efficiency, and compliance with health and safety regulations make it an excellent investment for any commercial kitchen looking to elevate its frying capabilities. With an emphasis on quality and operator convenience, the FBR18 Series is a game-changer in modern frying solutions.
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